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LM2991SX
+NomenclatureIC REG LINEAR NEG ADJ 1A DDPAK
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FabricantSemi - conducteurs nationaux
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Pièce fabricant #LM2991SX
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Fiche technique LM2991SX DataSheet
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Package TO-263 (KTT)-5
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En stock4339
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Spécifications
| Attribut | Valeur |
| Package | Bulk |
| ProductStatus | Active |
| OutputConfiguration | Negative |
| OutputType | Adjustable |
| NumberofRegulators | 1 |
| Voltage-Input(Max) | -26V |
| Voltage-Output(Min/Fixed) | -3V |
| Voltage-Output(Max) | -24V |
| VoltageDropout(Max) | 1V @ 1A |
| Current-Output | 1A |
| Current-Quiescent(Iq) | 0.7 mA |
| Current-Supply(Max) | 5 mA |
| PSRR | 60dB (1kHz) |
| ControlFeatures | Enable |
| ProtectionFeatures | Over Temperature, Short Circuit |
| OperatingTemperature | -40°C ~ 125°C |
| MountingType | Surface Mount |
| Package/Case | TO-263-6, D²Pak (5 Leads + Tab), TO-263BA |
Présentation
Description
Key features include a wide input voltage range from -26V to -3V, adjustable output voltage, and a low quiescent current, which reduces power consumption in applications where efficiency is crucial. The LM2991SX also includes built-in protection features such as current limiting, thermal shutdown, and safe operating area (SOA) protection, ensuring reliability and safeguarding the device against potential damage from over-current or overheating conditions.
The LM2991SX comes in a TO-263 surface-mount package, which facilitates easy integration into compact designs. Overall, this voltage regulator is suitable for use in telecommunications, industrial, and automotive applications requiring stable and efficient negative voltage regulation.
Equivalent
1. LT1964 - Negative LDO regulator from Analog Devices.
2. NCP560 - Negative LDO from ON Semiconductor.
3. MIC79110 - Negative LDO from Microchip Technology.
4. MC7912 - Negative voltage regulator from ON Semiconductor.
Ensure compatibility with your specific requirements, as specifications may vary.
Features
1. Output Voltage Range: Adjustable from -3V to -24V.
2. Output Current: Can deliver up to 1.5A.
3. Low Dropout Voltage: Typically 0.6V at 1A output current, improving efficiency and allowing for use in low-voltage applications.
4. Wide Input Voltage Range: Operates with input voltages up to -26V.
5. Protection Features: Includes current limiting and thermal shutdown to prevent damage under fault conditions.
6. Remote Sensing: Capable of remote output voltage sensing to compensate for voltage drops in the wiring.
7. Reverse Polarity Input Voltage Protection: Tolerates reverse polarity inputs without damage.
8. Thermal Regulation: Maintains output voltage regulation even during temperature variations.
These features make the LM2991SX suitable for use in various electronic applications where a stable negative voltage supply is required.
Pinout
1. Vin (Pin 1): Input voltage. This pin receives the negative input voltage that you want to regulate.
2. GND (Pin 2): Ground. This pin is connected to the system ground.
3. Vout (Pin 3): Output voltage. This pin provides the regulated negative output voltage.
4. Adj (Pin 4): Adjustment. This pin is used to set the output voltage through an external resistor divider network.
5. NC (Pin 5): No Connection. This pin is not connected internally and is used for mechanical stability.
The LM2991SX is typically used in applications requiring a stable negative voltage with low dropout, featuring a wide input range and the ability to supply up to 1.5A of output current. It is commonly utilized in power management for electronic devices.